Milking-machine



R. A. CASAROTTI.

MILKING MACHINE.

APPLICATION msn APR. 8. 1920.

1,379,800; Patented May 31, 19211;;

j v INVENTOR:

Romef A TTORNEY ROMEO A. cAsAnorfrI, or NicAsIo, CALIFORNIA,

IVIILKING-IVIACHINE.

. Appiication filed April 5,1920. serial 116,372,114.V

.ToV all 'whomizfmay concern: e

. Be it known'thatI, RoMEo A. CAsARoTTI,

a'citizen of the United States, residing lat Nicasio,in the county ofMarin, State of California, have invented certain new land useful Improvements in lVIilking-lVlachines;`

and I do declare the following to'be a full, cleaigand exact description of the same, ref ere/nce being had t0 the accompanying drawings, and `to the characters ofreference marked thereon, which form a part of this This invention relates to improvements in milking machines such as are now widely used, and 'which operate to milk the cows by means of an intermittently applied vacuum.

In all such machines, thev pulsator is the part which is the most important, since ,this

. member controls they vacuum.

@All pulsators nowmade, as far as I am aware, either'make use of, a diaphragm inuencedby air pressure, orjelse some complicated valve mechanism. These devices A are not onlyexpensive, but on account of the therefore is toprovide a pulsator, con.

structedina substantial fashion and in which the vacuum cut-off lis mechanically controlled, and in'which the p'eriodsof cutoff or alternations are positively timed ac- 'cording toffa predetermined plan, and which times willbe repeated in fixed and assured sequence during the entire operationof the.

milln'ng.

,Av further object 0fr the invention is to produce, a simple and inexpensive device, and yet one which will be exceedingly effective for the purposes for which it is de- 'signed-TfV These objects I accomplishby means of such structure and relative arrangement of parts aswill fully appearf'by a perusal `of the following specification' v'and claims. In the drawings similar charactersnof ref- Specificaton of Letters Patent. Patented erence indicate;correspondingparts in the several views.

Figure 1 is asectional elevation of my improved 'pulsaton Fig. 2 is a top'plan view of the same,

showing the valve vactuating mechanism.

Fig. 3 is a fragmentary view of the valvecam cooperating with valve con- A actuating trolling rod.` l Y Referring now'more particularly to the characters of reference ont'he drawings, the

numeral 1 denotes the hollow bodyfof' the valve, the upperend of which is tapped as aty 2 to adapt it for connection to "a pipe-line. Immediately below such tapped end is an ordinary 'straight-way shut-oil valve 3,

T orties.

May 31, 1921;

turned byl means ofa handle 4. This valve isl for the purpose of cutting `off the main pipeline from thebody bfl the valvefcasing therebelow. f Y l e Below said valve the body is branched to form two passages 5 and 6. The passage? way 5 has continuous communicationwith' the valve 3, while the other isnormally shut off .therefrom by a 'wall 7.

A -port.forming a'valve seat 8 is Vbored through the wall, and is adapted to receive a double taper-faced valve 9, one face 9aL of whichse'ats therein, this valve opening out- Wardly may from th passageway 5. The" opposite .and outer face 91? of this 'valve is adapted` to .seat in a valveeseat `or port.' 10 oppositely disposed to the seat 8, and formed in a'plug or cap 11 screwed. into therv body.

The valve9 ofcourse bears against its seats one ata, time, there being a, suitable distance between such seats. The valve 9 is mounted on a stem 12 projecting through thecap 11 and slidable therein.`l Y i Atmospheric pressure is admitted through the valve-seat 10 to the passageway 6 by means of holes 13 provided in the cap 11.v Tapered tubularmembers 1 4; are secured in the .lower endsof the passageway in parallel alinement, being adapted to receive the usual form of rubber tubing thereover. A bearing boss 15 projects from one side o f the body 1 at right angles to the stem 12 andl substantially in alinement therewith yto form a bearing for a rod 16 slidableftherei in; This rod has an arm 17 yfixed thereto, which extends to the stem 16, the latter being slidable therethrough. The arm is held in a'xed position relative to said stem by means of springs 18 on the stem on each side of the arm and bearing thereagainst, the other end of one of the springs bearing against a pin 19 in the stem, and the other end of the other spring bearing against adjusting nuts 20.

These springs are both of the same" strength, so are counterbalanced, thus insuring that the stem will move longitudinally when the arm moves laterally, while allowing a certain amount of lliexibility of said stem relative to the arm.

Turnably mounted at right angles to the rod' 16 thereunder is a shatt'21, driven by a belt 22 or other driveV at a predetermined R. P. M., as may be vfound bestsuited. Fixed on this shaft in Valinement with the rod 16 is a cam 23, adapted to engage a` rigid lug 24 on the rod. This cam is so shaped that with the rotation of the sha'l't, thelug will be engaged thereby, and will be moved along a distance'equal to the space between the valve-seats 8 and 10, and will be then held in such position during approximately one-half the rotation of said shaft. VThe cam then disengages from the lug, thus releasing the same and the rod is pulled back to normal position by means oi' a suitably arranged spring 25. y l

By this means, the valve 9 will ybe positively shifted from one valve seat to the other at predetermined and regularly occurring times. l

ln the position of the valve shown in Fig. 1 of the drawings, atmospheric pressure is entering the passageways 6. 1When the valve is moved outwardly the seating of the valve inthe seat 10 cuts oil the atmosphere and opens communication from said passageway to the vacuum-pipe.

rlhe operations caused by the alternating vacuum 1s common to all milkingmachines, and hence will not be here described.

1n practice, in a dairy, there are of course a number ofv said pulsators, or different batteries thereof. Each battery would be actuated in unison by a common rod 16, while all the rods 16 wouldl be actuated from the single power driven shaft 21. y

From the foregoing description it will be readily seen that l have produced such a device as substantially fulfils the object oli' the invention as set Jforth herein.

vk`While this specification sets forth in detail the present and preferred construction of the device still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention what I claim as new and useful and desire to secure by Letters Patent is 1. A pulsator for milking machines comprising a valve body adapted to be connected to a vacuum pipe line, a passageway leading from said body in continuous communication with said pipe line, another passageway leading from said body, the body being provided with spaced and oppositely alined ports leading to the last named passageway from the vacuum pipe line and the atmosphere respectively, and Ia common valve adapted to alternately seat in such ports to close the same.

2. A pulsator for milking machines comprising a valve Abody adapted to be connected to a vacuum pipe line, a'passageway leading from said body in continuous-communication with said pipe line, another passageway leading from said body, the body being provided with spaced and oppositely alined portsy leading tothe lastnamed passageway from the vacuum pipe line and the atmosphere respectively, and a common valve adapted to seat in either at a time of such ports and to be positively normally seated in the port leading from the vacuum pipe line. y Y

3. A pulsator for milking machines comprising a valve body adapted' to .be connected to a vacuum pipe line, a passageway leading from said body in continuous communication with said pipe line, another passageway leading fromsaid body, the' body being' provided with spaced and oppositely alined ports leading to the last named passageway from the vacuum pipe line and the atmosphere respectively, a common valve adapted to alternately seat in such ports to close the same, a spring normally holding the valve seated in one of the ports, and a common means for moving said valve from said port to close the other port and for holding the same in such last named position for a predetermined period' of time against the pressure of the spring.

l. A pulsator for milking machines comprising a valve body adapted to be connected to a vacuum pipe line, a passageway leading from said body in continuous communication with said pipe line, another passageway leading from saidbody, the body being provided with spaced and oppositely alined ports leading to the last named passageway from the vacuum pipe line and the atmosphere respectively, a common valve adapted to alternately seat in suchports to close the same, a stem on the valve projecting from the body, a rod parallel to the stem, anV arm on the rod connected to the stem, and means for moving said rod a distance equal to the spacing of the ports in the body.

5. A pulsator for milking machines comprising a valve body adapted to be connected to a vacuum pipe line', a passageway leading from said body in continuous communication with said pipe line, another passageway leading-.trom said body, the body being provided with spaced and oppositely alined ports leading to the last named passageway from the vacuum pipe line and the atmosphere respectively, a common valve adapted to alternately seat in such ports to close the same, a stem on the valve projecting from the body, a rod parallel to the stem, an arm on the rod connected to the stem, a power driven shaft at right angles to the rod, a cam on the shaft, and a lug on the rod with which the cam engages, the lug being 10 held by the cam insuch moved position for a predetermined portion of the rotation of the cam.

In testimony whereof I aiX my signature.

ROMEO A. oAsARoTTI. 

